Dish washing machine



Nov. 10, '1931. w. 1.. LINDGREN 1,331,775 I DISH WASHQING MACHINE Filed July 10. 1929 a Sheets-Sheet, l

ITUYQDE:

I NOV. 10, 1931. w, UNDGREN 1,831,775

DISH WASHING MACHINE Filed July 10, 1929 3 Sheets-Sheet 2 Nov... 10, 1931. w. L. LINDGREN 1,831,775

DISH same IIACHINE Filed July 10. 1929 3 Sheets-Sheet 3 Patented Nov. 10, 1931 L. Lnmennn,

OI WAUKEGAN, IL INOIS msn wesnnw Application filed July 10,

My invention is concerned with dish washing machines, and is designedto produce ..a simple structure in which a motor serves to throw a powerful whirling spray or plurality of sprays through the dishes to be washed,

which will be held in a suitable skeleton basket or container enclosed in a casing which will cause the water to rebound from its top and sides back on to the dishes to assist in their cleansing.

To illustrate my .invention, I annex hereto three sheets of drawings, in which the same reference characters are used to designate identicalffiparts in all the figures, of which,-

Fig. 1 is a central vertical section through a machine embodying my invention; Fig. 2 is a horizontal section on the line 22 of Fg. 1;

, Fig. 3 is a View, partly in section, on the line 33 of Fig. 1, but on an enlarged scale and with the trough omitted;

Fig. lis a detail of one of the scooping pipesas seen from the line 4-4 of Fig. 3;

d Fig." 5 is a view of a portion of the bottom of the trough, showing the outlet through which the water is discharged after using,

Fig. 6 is a top plan view of the same, on an enlarged scale, as seen from the line 66 of Fig. 5; and

Fi" 7 is a vertical section as seen on the line -7 of Fig. 6. i In carrying out my invention in its preferred form, I employ the generally cirgcular base casting 10. which forms the major portion of the trough, and which may have three -or inore lugs 11' on its bottom,'on which it rests; The outer portion ofthe trough is formed by another casting 12, bolted or screwed to the casting 10. by the screws 13' electric motor 15 splvslpended therefrom, the

1929. Serial in. 377,252.

the armature shaft 16 and having the race 21 for the ball bearings 22 on the'under side thereof, the top of the casting 18 having secured thereon the ball-bearing race 23.

With the construction shown, it will be obvious that the armature shaft 16 is free to rotate in the casting 18, which is rotated by the armature shaft 16 though the medium of the spur-gear pinion 24 secured on the armature shaft between the casting 10 and the casting 18, and which meshes with the idle spur-gear pinion 25 journaled upon thebearing stud 26 secured in the top of the casting 10. The rotating casting 18 has secured to the under side of its periphery, by the plurality 'of screw bolts 27, an an nulus 28 which has internal spur-gear teeth 29 meshing with the spur-gear pinion 25 so that the annulus 28 is rotated. The smooth under surface of this annulus 28 is in substantial engagement with the smooth top surface of the central portion of the casting 10,

and to prevent the possibility of any water passing from the outer portion of the annulus 28 inwardly to reachthe armature shaft of the motor, I provide on the under side of the central adownwardly-pro ecting annular flange 30 fitting in an annular channel 31 formed in the upper surface of the top of the casting 10 to receive the same. Grease or some other ortion of the annulus 28 lubricant which resists the passage of water may be place dfin the channel 31.

Secured to the topof the annulus28, near its periphery, by the bolts 32, is one or more (preferably four) nozzles 33, which are of the shape. best seen in Figs. 1 and ,3, andwhich discharge streams of water upward and inwardly. These nozzles fit over the apertures 34 in the annulus 28, and, extending downwardly therefrom, sothat they. form continuations' of the nozzles 33, are the scooping pipes 35, which are secured onthe un der side of the annulus 28 by the same bolts .32 which hold the nozzles 33 in lace, said bolts co-operating with flanges ormed on the bottoms of the nozzles 33 and on the tops of the scooping pipes 35. These scooping pipes 35 are of a shape which "will be understood from Figs. 3 and 4., where it will be seen that the lower ends are substantially circular in theiroutline and of a much greater area than-the discharge ends, due to the fact secured directly to the under side of the annulus 28, but is secured to the flange 37,

which, as seen in Fig. 3, extends in the arc of a circle to a little less than ninety degrees, andis secured to the annulus 28 by the bolts 38, as clearly seen in Figs. 3 and 4. To prevent the water in the bottom of the annular .43, and an annular packing trough from whirlin and thus avoid being scooped up by the pipes 35, I locate in the bottom of the trough numerous bafile plates 39, 40 and 41, which are in the same vertical plane, the baflle plates 39 being carried by the casting 12, while the baffle plates 40 and 41 are on the upper surface of the casting 10, the plates 40 and 41 being separated so as to allow the water to drain out of the bottom of the trough. To permit the water to drain out, I provide the outlet shown in Figs. 5, 6 and 7, where it will be seen that the outer portion of the bottom of the casting 10 is provided with a flattened pipe 42 extending therefrom and having its bot tom flush with the bottom of the trough formed by the castings 10 and 12. The pipe 42 as it leaves the trough. becomes circular at its outer end 43, which is provided with the flange 44, so that its end may be closedby the disk 45 having the inwardly-projecting flange 46 fitting into the end of thepipe ring 47 interposed between the end of the pipe and the periphery of the disk 45; The disk 45 has the ears 48, between which is pivoted the link 49 which has in its other end the elongated slot 50, through which passes the pin 51 connecting the ears 52 extending upward -from the pipe 43. With the structure thus far described, it will be obvious that the disk 45 can be withdrawn and swung outwardly and upwardly when it is desired to open the apparatus and discharge the water. To hold the disk or cap 45 securely in place when the apparatus is in use, I provide the clamp 53, best seen in Fig. 6, which has the general shape of a yoke and is pivoted by the screw 54 passing through the ear 55 thereof into the flange 44 of the pipe 43. The other end of the clamp 53 has the lug 56 adapted to co-operate with the flange 44 on the opposite side of the pipe, and the clamp is secured in place with any debeing removed, I preferably provide the valve shown in Figs. 6 and 7, which consists of the handle 59 secured on the upper end of the cylindrical valve stem 60, which passes down through the aperture 61 formed in the top of the pipe 43, and has its central portion cut away to receive the circular leather or rubber disk 62 secured between the smaller metal disks 63 by the screw bolt 64 passed through the valve stem and the three disks, as will be readily apparent. The diameter of the disk 62 is the same as the internal diameter of the pipe 43, so that when the disk 62 is turned transversely, it stops the flow of the Water, which can be permitted by turning the bandle 59 away from the position shown in the drawings.

Secured to the annular flange 65 forming the top of the casting 12', by the bolts 66, is

a flat metal ring 67, which has riveted on the top thereofthe sheet-metal bottom portion 68 of the casing. This is curved from the horizontal position of the bottom portion to the vertical portion of the top portion, which is reinforced by the circular rod 69, around which the upper end of the portion 68 of the casing is curled. Riveted on the inside of this portion 68 are a number of Z-shaped spacers 70 which have their inner flanges riveted to the sheet-metal lining piece 71, which has its upper end strengthened by being curled around the circular rod 7 2, while its lower end has the downwardlyturned flange 73. The cover portion-of the casing is made up of the cylindrical vertical part 74 made of sheet-metal and preferably having its lower end' reinforced by being curled around the circular rod 75. An annular head 76 is formed toward the bottom of the cover so that it will rest on the top of the portion of the casing that is curled around the rod 69. A pair of handles 77 may be mounted on the sides of the cylindrical portion 74, which has its upper edge and secured within the rolled-over edge 78 of the top portion 79, which is preferably concaved on its under side, as clearly shown in Fig. 1. It will be understood that the cover is removed when the dishes are to be put in place, and replaced before the washing begins. It will also be understood that the turned over water thrown upward from the nozzles 33. will, to some extent, pass through the dishes in the holder to be described andZstrike-the sides and top of the cover and' be deflected back on to the dishes, thus washing the upper portion thereof.

To support the dishes to be washed, I provide the basket shown in Figs. 1 and 2, where it be seen that I provide the top and hotstac opening in the bottom of forced upwardly and inwardly t rough they 83 is connected at frequent intervals by the vertical links 85 with the ring 86 located above it, and this ring 86 is in turn connected at frequent intervals by the substantially vertical links 87 with the ring 88, inside of and somewhat above the ring 80. Inside of the ring 86 and at the same lev is a ring 89 connected thereto at frequent intervals by the horizontal links 90. This ring 89 isconnected at frequent intervals by the substantially-vertical links 91 with the ring 92, and this ring 92 is in turn connected at frequent intervals by the substantially vertical links 93 with the ring 94 located inside of andsomewhat above the ring 88. The ring 92 is connected at frequent intervals by the links 95 with the ring 96, which in turn is connected at frequent intervals by the substantially vertical links 97 with the ring 98 located inside of and some-' what above the ring 94. The bottom of-the inner portion of this wire-basket structure is formed by the wires 99, seen in Fig. 2, which are connected at their ends to the ring 96, and form a square mesh screen upon which are placed the knives, forks, spoons, eLc., which would not be held in the other portions of the basket, and it will be understood that the plates, etc.,,' are placed vertically in the annular channels formed by the skeleton frame work thus described. u

The operation of the apparatus will be readily apparent. When the cover is removed, the dirt dishes, and knives -and forks,'etc., are

ked in the wirevbasket, which is put in place, and the trou h is partially filled with ot soapy water. he cover is then put in place and the motor started, and the water 1n the trough will be scooped up by the large the pi s 35 and nozzles 33, giving a whirling spray through the dishes held' in the skeleton basket. Such water as passes between the dishes will strike the sides and top of the cover and be deflected back on the dishes. The lining piece or .bafile plate 71 catches the water thrown upwardly, and prevents its reaching the joint between the ring 69 and the bead 76, and pos siblyescaping therethrough, and as the water returns, it can flow down between the bafile plate 71 and the ring 7 5,- and reach the trough.

When'the apparatus has been operated for the necessary time, a very'few minutes, the motor is stopped, the drain valve opened, and the dirty, soapy water removed, after which fresh, clean, hot water will be placed in the trough, and the cover replaced and the motor I started, so as to rinse the dishes thoroughly by the same method as was employed in washing them, after which they can be removed and dried. The dirty water might be removed whil g the motor is still running, if it can be reversed, in which case the water will be forced out, instead of thrown upward by the scooping pipes.

lVhile I have shown and described my inventionas embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure byLetters Patent of the United States, is:

1. In a. dish-washing machine, the combination with a casing, of a skeleton container therein, an annular trough in the bottom of the casing of small cross section as compared withthat of the complete casing, a plurality of scooping pipes located in a single circle and having their lower ends extending into the trough and their discharge upper ends beneath the container, and means for rotating said scooping pipes about a vertical axis.

2. In a dish-washing machine, the combi-- nation with a casing, of a skeleton container.

therein, an annular trough in the bottom of the casing, a plurality of scooping pipes having theirlower ends extending into the trough and their discharge upper ends beneath the container, an annulus carrying said scooping pipes having gear teeth on its interior, a motor having, a vertical armature shaft suspended from the casing, a driving pinion on the armature shaft, and an intermediate idle gear between the driving gear and the annulus. I

3. In a dish-washing machine, the combin'ationwith a base consisting of an annular trough .with a central web at the top of the trough, of a motor suspended from saidbase and having its vertical armature shaft extending up through said central web, a circular casting rotatable on the top of the armature shaft, an annulus depending from the periphery of the casing, a plurality of SCOOPlIlg .consisting' of a sheet-metal outer side and bottom portion connected to a sheet-metal inner side and bottom portion by spacing members, a sheet-.metalcover for the casing havin an annular rib therein to rest on the top the outer side portion and having its bottom extending down between the two side portions, a skeleton container supported on the inner side and bottom portion, and means for throwing sprays of water from the base v up through the skeleton container.

5. In a-dish-washing machine, the combination with a casing, of a skeleton container therein, an annular trough in the bottom of the casing, a scooping pipe having its lower end extending into the trough and its discharge upper end beneath the container, and an electric motor located within the central outside portion of the trough and having a vertical armature shaft and suitable gearing between its armature shaft and the scooping pipe to rotate the latter located above the effective top of the trough.

In witness whereof, I have hereunto set my hand this 1st day of July, 1929.-

WALDEMAR L. LINDGREN. 

